ATMEGA16A-AUR Atmel, ATMEGA16A-AUR Datasheet - Page 233

• Manufacturer Part Number: ATMEGA16A-AUR
• Description: MCU AVR 16KB FLASH 16MHZ 44TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA16A-AUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

24.3.1
24.3.2
24.3.2.1
24.3.2.2
24.3.2.3
24.3.3
8154B–AVR–07/09
Bypass Register
Device Identification Register
Reset Register
Version
Part Number
Manufacturer ID
The Bypass Register consists of a single Shift Register stage. When the Bypass Register is
selected as path between TDI and TDO, the register is reset to 0 when leaving the Capture-DR
controller state. The Bypass Register can be used to shorten the scan chain on a system when
the other devices are to be tested.
Figure 24-1
Figure 24-1. The Format of the Device Identification Register
Version is a 4-bit number identifying the revision of the component. The JTAG version number
follows the revision of the device. Revision A is 0x0, revision B is 0x1 and so on. However, some
revisions deviate from this rule, and the relevant version number is shown in
Table 24-1.
The part number is a 16-bit code identifying the component. The JTAG Part Number for
ATmega16A is listed in
Table 24-2.
The Manufacturer ID is a 11 bit code identifying the manufacturer. The JTAG manufacturer ID
for ATMEL is listed in
Table 24-3.
The Reset Register is a Test Data Register used to reset the part. Since the AVR tri-states Port
Pins when reset, the Reset Register can also replace the function of the unimplemented optional
JTAG instruction HIGHZ.
A high value in the Reset Register corresponds to pulling the External Reset low. The part is
reset as long as there is a high value present in the Reset Register. Depending on the Fuse set-
tings for the clock options, the part will remain reset for a Reset Time-Out Period (refer to
Bit
Device ID
Version
ATmega16A revision TBD
Part Number
ATmega16A
Manufacturer
ATMEL
shows the structure of the Device Identification Register.
JTAG Version Numbers
AVR JTAG Part Number
Manufacturer ID
MSB
31
Version
4 bits
Table
Table
28
24-3.
24-2.
27
Part Number
16 bits
12
11
JTAG Version Number (Hex)
JTAG Manufacturer ID (Hex)
JTAG Part Number (Hex)
Manufacturer ID
11 bits
0x9403
0x01F
TBD
ATmega16A
Table
1
24-1.
LSB
1 bit
“Clock
0
1
233